<template>
  <div class="login_container">
    <div class="login_box">
      <!-- 登录框头像盒子 -->
      <div class="avatar_box">
        <img src="../assets/logo.jpg" alt="" />
      </div>
      <!-- 表单区域 -->
      <el-form
        label-width="0px"
        class="login_form"
        :model="loginForm"
        :rules="loginformrules"
        ref="loginFormref"
      >
        <!-- 用户名 -->
        <el-form-item prop="username">
          <el-input
            prefix-icon="iconfont icon-user"
            v-model="loginForm.username"
          ></el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item prop="password">
          <el-input
            prefix-icon="iconfont icon-3702mima"
            v-model="loginForm.password"
            type="password"
          ></el-input>
        </el-form-item>
        <!-- 按钮区域 -->
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="resetLoginForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>
<script>
export default {
  data () {
    return {
      //  这是表单数据绑定对象
      loginForm: {
        username: 'admin',
        password: '123456'
      },
      //  表单验证规则
      loginformrules: {
        //  验证用户名是否合法
        username: [
          { required: true, message: '请输入用户名', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在 3 到 10个字符', trigger: 'blur' }
        ],
        //  验证密码是否合法
        password: [{ required: true, message: '请输入密码', trigger: 'blur' }]
      }
    }
  },
  methods: {
    //  点击重置表单
    resetLoginForm () {
      this.$refs.loginFormref.resetFields()
    },
    //  登录按钮点击事件
    login () {
      //  表单预验证
      this.$refs.loginFormref.validate(async valid => {
        if (!valid) return false
        //  发送登录请求验证
        const { data: res } = await this.$http.post('login', this.loginForm)
        if (res.meta.status !== 200) return this.$message.error('登陆失败!')
        this.$message.success('登录成功!')
        //  1.登录成功将服务器返回的token保存到本地
        window.sessionStorage.setItem('token', res.data.token)
        window.sessionStorage.setItem(
          'userInfo',
          JSON.stringify({
            user: res.data.username,
            rid: res.data.rid,
            email: res.data.email
          })
        )
        //  2.通过编程式导航跳转到后台主页   地址是'/home'
        this.$router.push('/home')
      })
    }
  },
  created () {
    // eslint-disable-next-line
    var _hmt = _hmt || []
    ;(function () {
      var hm = document.createElement('script')
      hm.src = 'https://hm.baidu.com/hm.js?0c348fdece3bad8c99c88978da4ba571'
      var s = document.getElementsByTagName('script')[0]
      s.parentNode.insertBefore(hm, s)
    })()
  }
}
</script>
<style lang="less" scoped>
.login_container {
  height: 100%;
  background-color: #2b4b6b;
}
.login_box {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  height: 300px;
  width: 450px;
  background-color: #fff;
  border-radius: 10px;
  .avatar_box {
    height: 130px;
    width: 130px;
    border-radius: 50%;
    border: 1px solid #eee;
    box-sizing: border-box;
    padding: 10px;
    box-shadow: 1px 1px 10px #ddd;
    position: absolute;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: #fff;
    img {
      width: 100%;
      height: 100%;
      // padding: 10px;
      background-color: #eee;
      border-radius: 50%;
    }
  }
}
.btns {
  display: flex;
  justify-content: flex-end;
}
.login_form {
  position: absolute;
  bottom: 0;
  width: 100%;
  padding: 0 30px;
  box-sizing: border-box;
}
</style>
